I solved inserting *wp-admin/tools.php* and *wp-admin/edit.php* in the whitelisted pages.
For more info you can see the screenshot in this articles (it’s in italian language but you have to see the image of the Firewall settings…)
https://www.generazione-internet.com/2009/11/16/problema-wp-db-backup-e-wordpress-firewall-come-risolverlo/
Hope it help you!
